﻿AQUATIC 
  INSECTS 
  IN 
  THE 
  ADIRONDACKS 
  529 
  

  

  Then 
  Hagen, 
  in 
  his 
  Synopsis 
  of 
  the 
  Neuroptera 
  of 
  North 
  America 
  

   ( 
  1 
  861), 
  ranked 
  deplanata 
  and 
  exusta 
  as 
  synonymous 
  (under 
  the 
  

   later 
  name, 
  however) 
  ; 
  in 
  his 
  Synopsis 
  of 
  the 
  Odonata 
  of 
  America 
  (1875) 
  

   he 
  ranked 
  them 
  separately, 
  remarking 
  that 
  deplanata 
  was 
  probably 
  

   but 
  a 
  dwarf 
  southern 
  form 
  of 
  exusta, 
  but 
  he 
  wrote 
  down 
  j 
  u 
  1 
  i 
  a 
  as 
  a 
  

   synonym 
  of 
  exusta. 
  In 
  1893 
  Calvert 
  in 
  his 
  Odonata 
  of 
  Philadelphia 
  

   and 
  vicinity 
  again 
  added 
  deplanata 
  to 
  the 
  exusta 
  lump. 
  The 
  

   three 
  have 
  been 
  treated 
  as 
  one 
  ever 
  since, 
  and 
  in 
  all 
  recent 
  descriptions 
  

   and 
  lists, 
  dimensions, 
  coloration, 
  structural 
  characters 
  and 
  distribution 
  

   are 
  hopelessly 
  confused; 
  and 
  it 
  becomes 
  necessary 
  to 
  revert 
  to 
  the 
  

   original 
  descriptions 
  to 
  find 
  statement 
  of 
  differences 
  between 
  them. 
  

  

  The 
  two 
  which 
  concern 
  us 
  here 
  in 
  New 
  York 
  are 
  L. 
  e 
  x 
  u 
  s 
  t 
  a 
  Say 
  and 
  

   L. 
  j 
  u 
  1 
  i 
  a 
  Uhler. 
  So 
  far 
  as 
  I 
  am 
  able 
  to 
  judge 
  by 
  my 
  own 
  specimens 
  

   and 
  by 
  those 
  in 
  the 
  Museum 
  of 
  comparative 
  zoology 
  at 
  Cambridge, 
  these 
  

   seem 
  to 
  be 
  distinguished 
  by 
  the 
  following 
  characters. 
  

  

  a 
  Dorsum 
  of 
  the 
  thorax 
  pale 
  with 
  a 
  black 
  stripe 
  each 
  side 
  on 
  the 
  humeral 
  

   suture, 
  no 
  ante-humeral 
  stripe 
  of 
  white 
  ; 
  the 
  fuscous 
  spot 
  on 
  the 
  base 
  

   of 
  the 
  hind 
  wing 
  not 
  enveloping 
  the 
  triangle 
  ; 
  the 
  eighth 
  abdominal 
  

   segment 
  of 
  the 
  male 
  narrower 
  than 
  the 
  seventh 
  ; 
  the 
  apex 
  of 
  the 
  anterior 
  

  

  branch 
  of 
  the 
  genital 
  hamule 
  of 
  the 
  male 
  directed 
  laterally 
  julia 
  

  

  aa 
  Dorsum 
  of 
  the 
  thorax 
  blackish 
  brown, 
  with 
  a 
  white 
  ante-humeral 
  stripe 
  each 
  

   side; 
  the 
  fuscous 
  spot 
  of 
  the 
  hind 
  wing 
  envelops 
  the 
  triangle 
  ; 
  the 
  eighth 
  

   abdominal 
  segment 
  in 
  the 
  male 
  is 
  as 
  wide 
  as 
  or 
  wider 
  than 
  the 
  seventh; 
  

   the 
  apex 
  of 
  the 
  anterior 
  branch 
  of 
  the 
  genital 
  hamule 
  of 
  the 
  male 
  is 
  

   directed 
  posteriorly 
  exusta 
  

  

  I 
  have 
  described 
  in 
  the 
  Canadian 
  entomologist 
  for 
  1897 
  (29:144-46) 
  

   the 
  nymphs 
  of 
  deplanata 
  from 
  Florida. 
  These 
  differ 
  from 
  the 
  

   nymphs 
  of 
  L, 
  j 
  u 
  1 
  i 
  a 
  described 
  below 
  by 
  some 
  unusu- 
  

   ally 
  good 
  specific 
  characters, 
  such 
  as 
  the 
  entire 
  absence 
  

   of 
  raptorial 
  setae 
  from 
  the 
  median 
  lobe 
  of 
  the 
  labium, 
  

   and 
  the 
  hooked 
  teeth 
  on 
  the 
  margin 
  of 
  the 
  lateral 
  lobes. 
  

   It 
  remains 
  now 
  to 
  discover 
  the 
  nymph 
  of 
  exusta, 
  and 
  

   to 
  learn 
  whether 
  deplanata 
  agrees 
  with 
  it. 
  

  

  It 
  will 
  be 
  observed 
  that 
  the 
  characters 
  given 
  in 
  the 
  

   generic 
  table 
  for 
  nymphs 
  at 
  the 
  beginning 
  of 
  this 
  sub- 
  ^j^ 
  g^ 
  ^^^^ 
  ^^2t^^ 
  

   family 
  abundantly 
  justify 
  the 
  erection 
  of 
  Lad 
  on 
  a 
  as 
  JuTffuhf 
  (u)^andL* 
  

  

  - 
  _ 
  ., 
  ,, 
  , 
  exusta 
  Say 
  (v) 
  

  

  a 
  genus 
  separate 
  from 
  L 
  i 
  b 
  e 
  1 
  1 
  u 
  1 
  a 
  . 
  

  

  L. 
  e 
  X 
  u 
  s 
  t 
  a 
  is 
  recorded 
  in 
  Calvert's 
  list 
  of 
  the 
  Odonata 
  of 
  New 
  York 
  

   state 
  from 
  Lake 
  George, 
  and 
  Croton 
  on 
  Hudson, 
  Whether 
  the 
  record 
  be 
  

   for 
  exusta 
  or 
  for 
  julia, 
  is 
  uncertain. 
  The 
  characters 
  given 
  above 
  

   will 
  I 
  trust, 
  enable 
  the 
  collector 
  in 
  the 
  future 
  to 
  distinguish 
  between 
  these 
  

  

  